<template>
  <Tabs />
</template>

<script setup lang="tsx">
import { useSlots, VNode, toRefs, provide } from 'vue-demi'
interface Emit {
  (e: 'update:modelValue', value: string): void
  (e: 'tab-click', value: { tab: VNode, index: number }): void
}
const props = defineProps({
  modelValue: {
    type: String,
    default: ''
  }
})
const slots = useSlots()
const emit = defineEmits<Emit>()
const { modelValue } = toRefs(props)
provide('activeName', modelValue)
const clickFn = (item: VNode, index: number) => {
  emit('update:modelValue', item.props?.name)
  emit('tab-click', { tab: item, index: index })
}
const Tabs = () => {
  const arr = (slots as any).default()
  const panels: VNode[] = []
  arr.forEach((item: any) => {
    // 处理基本的写法，直接内部写 XtxTabPane
    // 以前写法，判断name：if (item.type.name === 'XtxTabsPanel') {
    // 现在写法，判断组件文件名
    if (item.type.__file?.includes('pane.vue')) {
      panels.push(item)
    } else {
      // 处理v-for的情况
      // 以前写法，判断name：if (item.children && item.children[0]?.type?.name === 'XtxTabPane') {
      // 现在写法，判断组件文件名
      if (item.children && item.children[0]?.type.__file?.includes('pane.vue')) {
        // 一个节点 => 7个panel
        item.children.forEach((panel: VNode) => {
          panels.push(panel)
        })
      }
    }
  })

  const navs = (
    <nav>
      {
        panels.map((item: VNode, index: number) => {
          return (
            <a
              class={{ active: props.modelValue === item.props?.name }}
              onClick={() => clickFn(item, index)}
              href="javascript:;"
            >
              {item.props?.label}
            </a>
          )
        })
      }
    </nav>
  )
  return <div class="xtx-tabs">{[navs, panels]}</div>
}
</script>

<style lang="scss">

.xtx-tabs {
  background: #fff;
  > nav {
    height: 60px;
    line-height: 60px;
    display: flex;
    border-bottom: 1px solid #f5f5f5;
    > a {
      width: 110px;
      border-right: 1px solid #f5f5f5;
      text-align: center;
      font-size: 16px;
      &.active {
        border-top: 2px solid $xtxColor;
        height: 60px;
        background: #fff;
        line-height: 56px;
      }
    }
  }
}
</style>
